Some Tests Complete on Sukhoi Engine Upgrade
which is a further development of the Al-31FM that powers the Sukhoi Su-27 fighter family. These tests have confirmed the static thrust increase of 4,080 lb. to 32,000 lb., compared with the basic engine. It also produces 2,200 Ib. more thrust than the Al-31FM1, an earlier upgrade.
An improved Iow·pressure turbine and fuII·authority digital engine control system are behind the FM2 improvement. Also, the engine has an assigned life of more than 3,000 hr. “The modernization of the Al-31F engine is being conducted without changing its size.
It is aimed at providing a chance to reengine the whole fleet of Su-27s without changes to the airframe or nacelles, says Salut’s acting chief designer, Gennady Skirdov. The engine will be shown for the first time at an industrial show at the Zhultcvsky flight-test center this summer. Flight trials are to start by early 2013. The manufacturer hopes that the Russian air force will select the engine to power Su-27SM3 fighters and Su-34 bombers.
